Siemens MICROMASTER 440 Operating Instructions Manual page 93

Issue 10/03
Skip frequency bandwidth (entered in Hz)
P1101 = 1.0
Modify the ramp
times ?
no yes
Ramp-up time
P1120 = 8
(enters the accelerating
time in s)
Ramp-down time
P1121 = 5
(enters the deceleration
time in s)
With rounding-
off ?
no yes
Ramp-up initial rounding
P1130 = 5.0
time (data entered in s)
Ramp-up final rounding
P1131 = 5.0
time (data entered in s)
Ramp-down initial
P1132 = 5.0
rounding time (data
entered in s)
Ramp-down final rounding
P1133 = 5.0
time (data entered in s)
Rounding type
P1134 = 0
NOTE
For discontinuous rounding (P1134 = 1), after the setpoint is reduced or
an OFF1 command, the final rounding at ramp-up (P1131) and the
initial rounding at ramp-down (P1132)are not executed.
Pulse frequency (entered in kHz)
P1800 = 4
The pulse frequency can be changed in 2 kHz steps. The range
extends from 2 kHz up to 16 kHz. The complete drive inverter output
current at 50°C is reached with 4 kHz.
The maximum output frequency is limited by the pulse frequency.
Operation up to 133 Hz is possible with a pulse frequency of 2 kHz. If a
higher output frequency is required, then the pulse frequency should
also be increased (10 kHz pulse frequency = maximum output
frequency of 650 Hz).
If low-noise operation is not required, then the drive inverter losses and
the high-frequency disturbances emitted by the drive inverter can be
reduced by selecting lower pulse frequencies.
Reference frequency (entered in Hz)
P2000 = 50
The reference frequency in Hertz corresponds to a value of 100 %.
This setting should be changed if a maximum frequency of higher than
50 Hz is required.
NOTE
This scaling acts on the maximum frequency as the analog setpoints,
fixed frequencies and motorized potentiometer normalization
operations are referred to 100 %.
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
0 Continuous smoothing (jerk-free)
1 Discontinuous smoothing
f
P1082
(f )
max
f
1
P1120
The rounding times are recommended
as abrupt responses can be avoided
therefore reducing stress and damage
to the mechanical system.
The ramp-up and ramp-down times are
extended by the component of the
rounding ramps.
3 Functions
t
P1121
93